F. Recchia

Nuclear Structure TowardsN=40Ca60: In-Beamγ-Ray Spectroscopy ofTi58,60

Excited states in the neutron-rich N = 38, 36 nuclei (60)Ti and (58)Ti were populated in nucleon-removal reactions from (61)V projectiles at 90 MeV/nucleon. The γ-ray transitions from such states in these Ti isotopes were detected with the advanced γ-ray tracking array GRETINA and were corrected event by event for large Doppler shifts (v/c ∼ 0.4) using the γ-ray interaction points deduced from online signal decomposition. The new data indicate that a steep decrease in quadrupole collectivity occurs when moving from neutron-rich N = 36, 38 Fe and Cr toward the Ti and Ca isotones. In fact, (58,60)Ti provide some of the most neutron-rich benchmarks accessible today for calculations attempting to determine the structure of the potentially doubly magic nucleus (60)Ca.

Discovery of a new isomeric state in

We report on the observation of a new isomeric state in

^{68}

^{68}

Ni: Evidence for a highly-deformed proton intruder state.

Ni. We suggest that the newly observed state at 168(1) keV above the first 2

Lifetime measurements in

^+

^{63}

state is a

Co and

\pi(2p-2h)

^{65}

0

Co

^{+}

Kr-96(36)60-Low-Z Boundary of the Island of Deformation at N=60

state across the major Z=28 shell gap. Comparison with theoretical calculations indicates a pure proton intruder configuration and the deduced low-lying structure of this key nucleus suggests a possible shape coexistence scenario involving a highly deformed state.